1. DO NOW:
LIST THE FIRST FIVE WORDS THAT COME TO MIND WHEN YOU THINK OF THE MALE REPRODUCTIVE SYSTEM.
NO SLANG PLEASE!

2. Human Male Anatomy Sperm
Head
The ultimate goal of the reproductive process is the formation and union of egg and sperm, development of the fetus, and birth of the infant.
Nucleus
Tail

3. Human Male Anatomy
Their main functions are the production of sperm—the male sex cells—and their delivery to the female.
The male sex organs are known as the male gonads.

4. BASIC ANATOMY.
W: Acrosome (cap)
X: Head
Y: Midpiece (mitochondria)
Z: Tail

5. BASIC ANATOMY. A: Bulbourethral gland B: Prostate Vas Deferens C: Anus
D: Ureter
E: Rectum
F: Coccyx (Tailbone)
G: Seminal Vesicle
H: Sacrum
Vas Deferens
Urethra
Testes
Penis
Epididymis
Scrotum

6. Where sperm form
Sperm production takes place in the testes, which are located in the scrotum.
The scrotum is a sac that contains the testes
Testis
Scrotum

7. Where sperm form
Because sperm can only develop in an environment with a temperature about 2–3°C lower than normal body temperature, the scrotum is positioned outside the abdomen.
Testis
Scrotum

8. Where sperm form
Within each testis is a fine network of highly coiled tubes called the Seminiferous tubules
Sperm are produced by meiosis of the cells that line these tubes.
When a single cell in the testis divides by meiosis, it produces four haploid cells.
All four of these cells develop into mature sperm over a period of about 74 days.

9. Where sperm form
A sperm is highly adapted for reaching and entering the female egg.
The head portion of a sperm contains the nucleus and is covered by a cap containing enzymes that help get into the egg.
Tons of mitochondria are found in the mid-piece of the sperm; they make energy for locomotion (moving)

10. Where sperm form
The tail is a typical flagellum that propels the sperm along its way.
Midpiece
(6 mm)
Fibrous sheath of flagellum
Head
(5 mm)
Mitochondrial spiral
Tail
(55 mm)
Nucleus
Cap

11. Sperm Survival
Sperm can survive outside of the body for no more than about an hour. In general, if the semen is still wet it may well have live sperm.
Once sperm enter the female body, however, their lifespan increases. Inside the vagina, sperm can only survive for about six hours.
Sperm may survive in the female reproductive system (fallopian tubes) for as long as 7 days, This means that fertilization can up to a full week after the sperm enters the body

12. How sperm leave the testes
Before the sperm mature, they move out of the testes through a series of coiled ducts that empty into a single tube called the epididymis.
Epididymis

13. How sperm leave the testes
When sperm are released from the epididymis, they enter the vas deferens, where they are stored for as long as two or three months until they are released from the body.
Vas deferens

14. How sperm leave the testes
The urethra is a tube in the penis that transports sperm out of the male’s body.
Bladder
Vas deferens
Seminal
vesicle
Prostate
gland
Urethra
The urethra also transports urine from the urinary bladder.
Bulbourethral
gland
Epididymis
Testis
Sperm-producing
tubes
Penis

15. How sperm leave the testes
Bladder
A muscle located at the base of the bladder prevents urine and sperm from mixing.
Vas deferens
Seminal
vesicle
Prostate
gland
Urethra
Bulbourethral
gland
Epididymis
Testis
Sperm-producing
tubes
Penis

16. Fluids that help transport sperm
The seminal vesicles are a pair of glands located at the base of the urinary bladder. They secrete a mucous-like fluid into the vas deferens.
Seminal
vesicle
Sperm
duct
Bladder
Prostate
gland
Penis
Epididymis
Scrotum
Urethra
Testis

17. Fluids that help transport sperm
Seminal
vesicle
This fluid is rich in the sugar fructose, which provides energy for the sperm cells.
Sperm
duct
Bladder
Prostate
gland
Penis
Epididymis
Scrotum
Urethra
Testis

18. Fluids that help transport sperm
The prostate gland is a single, doughnut-shaped structure found below the urinary bladder and surrounds the top portion of the urethra.
The prostate secretes a thinner fluid that helps sperm move and survive.
Prostate
gland

19. Fluids that help transport sperm
Two tiny bulbourethral (bul boh yoo REE thrul) glands are located beneath the prostate.
Prostate
gland
Bulbourethral
gland

20. Fluids that help transport sperm
These glands secrete a clear, sticky fluid that protects sperm from the acidic environment of the male urethra and female vagina.
Prostate
gland
The combination of sperm and all of these fluids is called semen.
Bulbourethral
gland

21. Hormones and male puberty
Hormones control the development and activity of the male reproductive system.
Puberty refers to the time when secondary sex characteristics begin to develop so that sexual maturity—the ability for sexual reproduction—is reached.
The changes associated with puberty are controlled by sex hormones secreted by the endocrine system.

22. Hormones and the male reproductive system
Testosterone, produced in the testes, is the steroid hormone responsible for the growth and development of secondary sex characteristics in a male.
Secondary Sex Characteristics: Growth of body hair, facial hair, increased muscle growth, deepening of the voice, increased release of oil and sweat